CN2733016Y - Plunger type fuel gas releaser for engine - Google Patents

Abstract

The utility model discloses a plunger type fuel gas releaser for engine, comprising a fuel gas mixing space and a fuel gas temporary storing space matching with the fuel gas mixing space. The fuel gas temporary storing space is provided with a gas conditioning piston unit, comprising a sleeve whose bottom is provided with a tapered fuel gas port and whose side wall is provided with vent holes. The end part of a piston is provided with a plunger type fuel gas adjusting mechanism which can extend into the sleeve, the far-end is matched with the tapered fuel gas, and the circumferential surface with the axial length is matched with the inner wall of the sleeve by the slide mode. The fuel gas temporary storing space is communicated with a fuel gas source. The fuel gas temporary storing space is communicated with the fuel gas gathering space sealed outside the sleeve through an idling fuel gas passage, and the opening and a controlled fuel gas passage arranged at the side of the air inlet of the fuel gas mixing space are respectively communicated with the fuel gas mixing space. The axial length of the slide fit part of a regulating end extended into the sleeve at least can simultaneously close all the vent holes arranged at the side wall of the sleeve. The device can improve the sufficient burning degree of the fuel gas to solve the problem of urgent accelerated flameout and insufficient motive power. The utility model can save energy and reduce the pollution discharge.

Description

Plunger type engine combustion gas releaser

Technical field

The utility model relates to a kind of combustion gas releaser that is used for motor, can be widely used in using the mini engine of fuel gas, as the motor that uses in the equipment such as motorcycle, small generator, suction engine, mowing machine.

Background technique

Conventional engines all is to comprise that fuel oils such as gasoline, diesel oil are fuel.Except that global fuel resource consumes rapidly the problem of bringing, cause the environmental pollution problem that is on the rise also to draw attention day by day by the exhaust emissions of motor.Wherein, with comprising that the gaseous fuel replacement oil fuel that compressed natural gas (CNG), liquefied petroleum gas (LPG) (LPG) etc. are called as " clean energy resource " is used more and more, equipment that adapts with it and/or component are also in research and extension constantly.Can being example with the matching used gasifying liquefied petroleum gas device of motorcycle at present; though it can guarantee the normal use under the steady work condition state of motor; but changing running state; particularly when anxious the acceleration; because of the acceleration performance extreme difference; it is obvious to quicken flame-out phenomenon; almost can't finish and anxious quicken or surmount working state such as anxious acceleration; not only greatly influenced engine power performance; also the use for these vehicles or equipment brings unsafe factor; and insufficient because of fuel gas buring, the discharging that has also increased energy consumption and pollutant is unfavorable for environmental protection.

Notification number is that the Chinese patent literature of CN 2406161Y has been reported a kind of vaporizer that is used to gaseous propellant engine.Has the gas mixing chamber and a combustion gas expansion box that cooperates with it that can be set at engine mixed gas body inlet end in its structure.In this combustion gas expansion box, be provided with a gas regulation piston unit, include in this piston unit a bottom be provided with fuel gas inlet and sidewall vertically successively spacing be provided with the overcoat of some vents, the free-end of piston body is connected with a combustion gas metering needle that stretches in said this overcoat, by the keying cooperate degree of this combustion gas metering needle and fuel gas inlet, regulate the gas supply flow under the working state.This combustion gas expansion box except that through the combustion gas gas-entered passageway with fuel gas source is communicated with, the controlled blast tube that also converges spatial communication through the idling blast tube and with the combustion gas of big envelope outside this overcoat respectively and be opened on combustion gas mixing spatial structure air intlet end is communicated with gas mixing chamber.Wherein be used to regulate the idling blast tube gas flow also be a needle valve structure.The gas supply flow all adopts is the needle valve regulation structure because it is used to regulate, and its requirement on machining accuracy and assembly precision is all very strict, thereby the difficulty of processing, assembling is all very big.

Notification number is that the Chinese patent literature of CN 2519857Y has also been reported a kind of gasifying liquefied petroleum gas device for the motorcycle use.It is similar to above-mentioned vaporizer with the basic structure form of a combustion gas gas storage chamber that cooperates with it that it has gas mixing chamber, except the adjusting of the gas flow of its idling blast tube needs by the independent solenoid valve, what be used to during working state to regulate gas flow is the combustion gas regulation structure of a plunger type.Its free far-end adopts one independently to be placed in rubber sleeve outside its end and to do keying with said bottom fuel gas inlet and cooperate, and is had than minor axis by it and to be slidingly matched to the outer circumferential face of the plunger type front end of length and the outer casing inner wall at its place.During working state, after this plunger type combustion gas regulation structure has been opened the bottom fuel gas inlet, the quantity of opening that sleeve side wall upper edge axial spacing is provided with vent is realized adjusting to required gas supply flow by regulating its plunger that it is slidingly matched when outer casing inner wall is slidingly matched.Though it improves traditional needle valve regulation structure, but find in the practice, along with the inevitably to-and-fro motion in overcoat when regulating gas flow of its plunger, be subjected to and outer casing inner wall between frictional force action under, independently be placed on rubber sleeve outside its plunger front end and very easily damage even come off.In addition, because its axial length of plunger outer circumferential face that is used to regulate gas supply flow is shorter, influenced by machining accuracy and with the prolongation of service time, the gap that is slidingly matched between itself and outer casing inner wall constantly increases, not only combustion gas is through the be slidingly matched easier generation of leakage at position, gap of plunger, and the combustion gas through hole through being opened and enter the combustion gas that big envelope converges in the space in this overcoat periphery combustion gas and cooperate through being positioned at this plunger that the leakage of overcoat also is unavoidable after the combustion gas through hole backflows after side face position.These all make the actual indoor effective gas quantity of combustion gas mixing that enters wish that with actual the air demand of control produces bigger deviation, are to cause that motor is anxious to quicken flame-out and one of the key factor that is short of power.

The model utility content

At above-mentioned situation, the utility model will provide a kind of plunger type engine combustion gas releaser that improves structural type, make it can increase substantially the sufficient combustion degree and the effective rate of utilization of combustion gas, reach the purpose of energy saving and minimizing disposal of pollutants, and can solve motor satisfactorily anxious quicken flame-out and problem such as be short of power, can also reduce the difficulty of processing/assembling greatly.

Plunger type engine combustion gas releaser of the present utility model, its basic structure form and above-mentioned existing report similar also has a combustion gas mixing spatial structure and the combustion gas that cooperates with it that can be located at engine gas mixed gas inlet end and stores up spatial structure temporarily.Store up temporarily in combustion gas and to be provided with a gas regulation piston unit in the spatial structure, include in this piston unit a bottom be provided with the taper fuel gas inlet and sidewall vertically spacing be provided with the overcoat of vent; The free-end of piston body is connected with a plunger type combustion gas regulation structure that stretches in said this overcoat.The one side of this plunger type combustion gas regulation structure can be done to open and close by its free far-end and said taper fuel gas inlet and cooperate, and its outer circumferential face with this plunger type combustion gas regulation structure of axial length also is slidingly matched with said outer casing inner wall on the other hand.Combustion gas is stored up spatial structure temporarily and is being communicated with fuel gas source through the combustion gas gas-entered passageway, and the controlled blast tube that converges spatial communication through the idling blast tube and with the combustion gas of big envelope outside this overcoat and be opened on combustion gas mixing spatial structure air inlet side also is communicated with the combustion gas mixing spatial structure respectively.The wherein said outer circumferential face axial length that this stretches into the part that is slidingly matched of the plunger type combustion gas regulation structure in the overcoat is at least can be with the required length of the whole simultaneously sealings of each vent on the sleeve side wall.Wherein said fuel gas source can comprise operable various gaseousness fuel commonly used at present such as CNG, LPG.

Be set to each vent on the sleeve side wall all to be sealed required length simultaneously at least owing to making this stretch into the side face axial length of doing to be slidingly matched in the interior plunger type combustion gas regulation structure of overcoat, the axial length of the part that is slidingly matched by increasing considerably itself and this outer casing inner wall, can improve effectively on the one hand and prevent and overcome the performance that causes the gas leakage that causes by its clearance portion that is slidingly matched because of machining accuracy and/or use, help reducing the precision and the difficulty of processing and/or assembling, on the other hand, except that handling the vent of being opened on sleeve side wall by regulating according to needs, other vent on the sleeve side wall still is in for all the other outer circumferential surface section branch sealings that are slidingly matched in this plunger type combustion gas regulation structure, converges the leakage problem that the combustion gas in the space is backflowed through other combustion gas through hole again thereby also prevented to enter big envelope combustion gas outside this overcoat effectively.These can both guarantee to the actual gas supply amount of motor effectively and be consistent by desirable control flow rate.

On the basis of said structure, for further improving the working stability of combustion gas releaser, can make the free far-end of said this plunger type combustion gas regulation structure be used for doing to open and close the position that cooperates with said taper fuel gas inlet, be adopted as the elastic material enclosed construction body that is embedded in the indent accommodating structure that its end face area is provided with, as rubber, teflon elastomeric material closure commonly used.In regulating the to-and-fro motion process of flow, because this enclosed construction body is to be embedded within the indent accommodating structure of the free end of plunger type combustion gas regulation structure, the inwall with said this overcoat does not have mutual rubbing contact, thereby difficult drop-off.Particularly make it adopt the closely mode of setting with interference slightly to cooperate, the elastic expansion power of this enclosed construction body also can further guarantee to set mutually tight, the unfailing performance of combination therebetween.

When adopting the combustion gas releaser of said structure, press under the stable prerequisite at the air feed that the assurance fuel gas source stores up spatial structure temporarily to combustion gas, said combustion gas is stored up this idling blast tube between spatial structure and combustion gas mixing spatial structure temporarily and can be provided with fully as traditional again and have any regulating the qi flowing in the channels stream joint structure such as current limliting adjusting screw (pin), and is adopted as the straight-through type channel design that guarantees minimum ventilation flow rate as calculated.

As improving combustion gas and Air mixing uniformity coefficient, and the measure that improves its sufficient combustion degree, comprising can be in above-mentioned combustion gas releaser, the said controlled blast tube that this is opened on combustion gas mixing spatial structure air inlet side is stretched in the combustion gas mixing spatial structure at least, and being furnished with combustion gas ejection micropore in the conduit wall punishment that is positioned at the combustion gas mixing spatial structure, the ventilation gross area sum of said each combustion gas ejection micropore and channel outlet should be less than the sectional area of controlled blast tube.Because this controlled blast tube is inserted in the combustion gas mixing cavity space structure and is distributed with combustion gas ejection micropore on this conduit wall that is positioned at combustion gas mixing cavity space structure, and this controlled blast tube outlet reaches the sectional area of the ventilation gross area sum of each micropore of offering less than this passage on conduit wall, therefore after entering this controlled blast tube, the combustion gas that has pressure can realize automatic supercharging, and spray in the combustion gas mixing cavity space structure by each micropore that distributes on its conduit wall, be easier to make it rapid with the air that enters, mix fully, thereby solved present combustion gas effectively only by near the nozzle ejection of combustion gas mixing cavity space sidewall and be difficult to and the rapid well-mixed problem of air, help improving combustion gas in the mixed gas and can fully be burnt and improve the utilization ratio of combustion gas, also help reducing the discharging of pollutant.

Based on same principle, on the basis of said structure, said this controlled blast tube is adopted as pass the combustion gas mixing spatial structure and is that its outlet nozzle is positioned at the outer the place ahead of combustion gas mixing spatial structure air intlet, make simultaneously this outlet nozzle also be adopted as the structure of the combustion gas ejection pore type of distribution again, obviously can more help the ejection of combustion gas and the air that enters with it fully mixes.

The test result that with the motorcycle engine is example shows, has adopted above-mentioned measure, can not only solve traditional gas engine motorcycle satisfactorily and quicken flame-out problem, and can adapt to satisfactorily equally and suddenly quicken or surmount working state such as anxious acceleration.

As improving combustion gas and air mixing fully in combustion gas mixing cavity space structure, uniformity coefficient, improve the combustion efficiency of combustion gas and the measure of the discharging that reduces pollutant to greatest extent, also comprise the vortex structure that can be provided with appropriate format at the airintake direction position of said combustion gas mixing cavity space structure.For example, this vortex structure in a specific embodiment, employing be an annular board-like simple structure that is provided with air-flow path at least at central part.Test result shows, increased this vortex structure after, can make combustion gas and Air mixing gas can sharply produce a large amount of eddy current, can make it by more well-mixed effect thereby reach, greatly improve the work by combustion efficient in motor.This vortex structure both can be used separately, also can be used in combination with above-mentioned structure, and the effect after being used in combination obviously can be desirable more.

Show with the test result of on motorcycle, carrying out equally, adopted above-mentioned vortex structure is set after, under the situation of same 150 type motorcycle and identical gas supply amount, the maximum speed of motor can be brought up to 8500-9000 rev/min by former 6500 rev/mins.Shown this vortex structure to improve fuel gas buring fully and engine power performance improved the extremely conspicuousness of effect.

Further the measure that improves above-mentioned combustion gas releaser safety and reliability and/or improve using effect can also comprise other additional structure that is provided with appropriate format.For example, can in the suction port of the temporary storage chamber body space of said combustion gas structure and the combustion gas gas-entered passageway between fuel gas source, be provided with air feed safety guarantee structures such as isopiestic pressure mechanisms such as including the gas constant pressure valve at least and/or security solenoid valve.Gas isopiestic pressure mechanism wherein can be realized the combustion gas decompression of the compression of fuel gas source or liquefaction and constant output again in required pressure range, both guaranteed that this combustion gas releaser imported an amount of combustion gas to motor, also save the trouble of user oneself adjustment supply gas pressure, made things convenient for use.Security solenoid valve can cut off source of the gas automatically at gas storage (liquid) bottle (jar) commonly used when accident is toppled over, prevent the leakage of combustion gas (liquid) and the serious accident that may cause.Again for example, can also in the suction port of the temporary storage chamber body space of said combustion gas structure and the combustion gas gas-entered passageway between fuel gas source, be provided with air feed supplementary structures such as including gas filtering structure and/or gas preheating structure at least or the like.Gas filtering structure wherein helps guaranteeing entering the pure degree of the combustion gas of motor.The gas waste-heat structure generally can be installed in outside the waste pipe, utilizes the waste heat of motor that preheating is carried out in combustion gas.Test result shows that the combustion gas after being preheated can be gasified more fully, and it is also more complete to burn, and therefore will more help reducing exhaust gas discharging and cut down the consumption of energy using behind the gas-preheating.

Practice and testing result show, the above-mentioned plunger type engine combustion gas releaser of the utility model can be widely used in various motors with gasoline as fuel at present, on small generators such as motorcycle, generator, suction engine, mowing machine, can be fully and replace traditional Carburetor satisfactorily and installed and used separately, and its fuel combustion is abundant, greatly reduced pollution, and significantly improved the power performance and the adaptability for working condition energy of generator environment.

Below, foregoing of the present utility model is further described in detail by the embodiment of accompanying drawing illustrated embodiment.But the scope that should at this point not be interpreted as the above-mentioned theme of the utility model only limits to following example.Do not breaking away under the above-mentioned technological thought situation of the utility model, the various replacements of making according to ordinary skill knowledge and customary means or the modification of change include in scope of the present utility model.

Description of drawings

Fig. 1 is the structural representation of a kind of plunger type engine combustion gas of the utility model releaser.

Embodiment

Plunger type engine combustion gas releaser as shown in the figure, there is the gas mixing chamber 21 and a combustion gas that cooperates with it that can be set at engine gas mixed gas inlet end to store up chamber 7 temporarily in the structure, stores up temporarily in the chamber 7 and in combustion gas and be provided with a gas regulation piston unit by existing mode.In this gas regulation piston unit, include can make the piston 14 of reciprocal adjustment movement by the spring 15 that is disposed one by one and be provided with a taper fuel gas inlet 22 in the bottom and its sidewall vertically spacing be placed with the overcoat 8 of some vents 9.The free-end of piston 14 is connected with a plunger type combustion gas regulation structure 11 that can stretch in this overcoat 8.Far-end end face in this plunger type combustion gas regulation structure 11 has an indent accommodating structure, wherein is equipped with one in interference mode slightly and is used for making to open and close the elastic caoutchouc closure 10 that cooperates with said taper fuel gas inlet 22; Have the outer circumferential face of this plunger type combustion gas regulation structure 11 of axial length and overcoat 8 inwalls at its place and be slidingly matched, and the axial length of the outer circumferential face of its part that is slidingly matched the while all to close required length consistent with overlap all vents 9 of offering on 8 sidewalls outside to the major general.Combustion gas is stored up chamber 7 suction tude 4 through being connected with suction port and fuel gas source gas storage (liquid) bottle 1 temporarily and is communicated with, simultaneously also respectively through idling solenoid valve 12 and straight-through type idling blast tube 13 and converge the controlled fuel tube 20 that chamber 23 is communicated with the combustion gas of big envelope outside this overcoat 8 and be communicated with gas mixing chamber 21.This controlled fuel tube 20 stretches into and passes gas mixing chamber 21, and with the outlet nozzle 16 that employing is distributed with combustion gas ejection pore type structure stretch in the air intlet of gas mixing chamber 21 outer before the place, side.Be furnished with some combustion gas ejection micropores in the controlled fuel tube 20 tube walls punishment that is positioned at gas mixing chamber 21, and each the combustion gas ejection micropore offered on its tube wall and the ventilation gross area sum of each the combustion gas ejection micropore on the outlet nozzle 16 should be less than the sectional areas of controlled fuel tube 20, with reach make the combustion gas that enters after the controlled fuel tube 20 can by after the supercharging automatically again by each spraying hole ejection that is positioned at different parts, realize and air fully mixing in gas mixing chamber 21.

Also be provided with the vortex structure 17 of an annular slab form in the position, air intlet end of gas mixing chamber 21,, also spacedly in its annular portion be provided with some ventilation side openings 18 except that heart portion therein is provided with the air-flow path 19.

Store up temporarily in fuel gas source gas storage (liquid) bottle 1 and combustion gas and also be disposed with security solenoid valve 2, gas isopiestic pressure mechanism 3, pneumatic filter 5 on the suction tude 4 of 7 of chambers and preferably be set near the outlet pipe gas preheating structure 6.

Claims (10)

1. plunger type engine combustion gas releaser, have a combustion gas mixing spatial structure (21) and the combustion gas that cooperates with it that to be located at engine gas mixed gas inlet end in the structure and store up spatial structure (7) temporarily, store up temporarily in combustion gas and to be provided with a gas regulation piston unit in the spatial structure (7), comprise in this piston unit a bottom be provided with taper fuel gas inlet (22) and sidewall vertically spacing be provided with the overcoat (8) of vent (9), the free-end of piston body (14) is connected with a plunger type combustion gas regulation structure (11) that stretches in the said overcoat (8), the free far-end of this plunger type combustion gas regulation structure (11) is done to open and close with said taper fuel gas inlet (22) and is cooperated, outer circumferential face and said overcoat (8) inwall with this plunger type combustion gas regulation structure (11) of axial length are slidingly matched, combustion gas is stored up spatial structure (7) temporarily and is communicated with fuel gas source (1) through the combustion gas gas-entered passageway, converge through idling blast tube (13) with the combustion gas of big envelope outside this overcoat (8) that space (23) is communicated with and the controlled blast tube (20) that is opened on combustion gas mixing spatial structure (21) air inlet side is communicated with combustion gas mixing spatial structure (21) respectively, it is characterized in that said that stretch into plunger type combustion gas regulation structure (11) in the overcoat (8) and overcoat (8) inwall are slidingly matched the outer circumferential face axial length of part at least can be with the whole required length of sealing simultaneously of each vent (9) on overcoat (8) sidewall.

2. plunger type engine combustion gas releaser as claimed in claim 1 is characterized in that it is the enclosed elastic structure (10) that is embedded at its end face indent accommodating structure that the free far-end of said this plunger type combustion gas regulation structure (11) is used for doing to open and close the position that cooperates with said taper fuel gas inlet (22).

3. plunger type engine combustion gas releaser as claimed in claim 1 is characterized in that the idling blast tube (13) that said combustion gas is stored up between spatial structure (7) and combustion gas mixing spatial structure (21) temporarily flows the straight-through type passage that saves structure for no regulating the qi flowing in the channels.

4. as the described plunger type engine combustion gas of one of claim 1 to 3 releaser, it is characterized in that the said controlled blast tube (20) that is opened on combustion gas mixing spatial structure (21) air inlet side stretches in the combustion gas mixing spatial structure (21) at least, and being furnished with combustion gas ejection micropore in the conduit wall punishment that is positioned at combustion gas mixing spatial structure (21), the ventilation gross area sum of said each combustion gas ejection micropore and channel outlet (16) is less than the sectional area of controlled blast tube (20).

5. plunger type engine combustion gas releaser as claimed in claim 4, it is characterized in that said controlled blast tube (20) is positioned at the outer the place ahead of combustion gas mixing spatial structure (21) air intlet for passing combustion gas mixing spatial structure (21) and outlet (16), this outlet (16) is the structure of the combustion gas ejection pore type of distribution.

6. as the described plunger type engine combustion gas of one of claim 1 to 3 releaser, it is characterized in that being provided with vortex structure (17) in the air intlet direction side of combustion gas mixing spatial structure (21).

7. plunger type engine combustion gas releaser as claimed in claim 6 is characterized in that said vortex structure (17) is for being provided with the annular plank frame of air-flow path (19) at least at central part.

8. as the described combustion gas releaser that is used for motor of one of claim 1 to 3, it is characterized in that in the combustion gas gas-entered passageway of spatial structure is stored up in combustion gas temporarily, being provided with safety guarantee structure and supplementary structure.

9. the combustion gas releaser that is used for motor as claimed in claim 8 is characterized in that including at least gas isopiestic pressure mechanism (3) and/or security solenoid valve (2) in said safety guarantee structure.

10. the combustion gas releaser that is used for motor as claimed in claim 8 is characterized in that including at least gas filtering structure (5) and/or gas preheating structure (6) in said supplementary structure.